The Fischer‐Tropsch Synthesis: Molecular Weight Distribution of Primary Products and Reaction Mechanism

Henrici‐Olivé, G.; Olivé, S.

doi:10.1002/anie.197601361

Cited by 373 publications

(118 citation statements)

References 6 publications

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“…Henrici- Olivé and Olivé (1976) made the link between the product distribution of the Fischer-Tropsch synthesis and that of Schultz-Flory oligomerizations. Anderson (1978) noted that such a chain growth mechanism had been proposed by various authors.…”

Section: Equilibrium Effect In Oligomerizationmentioning

confidence: 99%

Notes on the issues of equilibrium in the Fischer–Tropsch synthesis

Norval

2008

Can J Chem Eng

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The product distribution for the Fischer-Tropsch synthesis is normally described using the kinetically derived (Anderson-Schultz-Flory) ASF model. Variations of the kinetic model have been proposed to explain deviations from the ASF distribution. The Fischer-Tropsch system can be equally well described using a pseudo-element (CH 2 , H 2 , O) equilibrium approach. A one-parameter equilibrium model is derived for the product distributions for alkenes, alkanes and alcohols.The Fischer-Tropsch system should be considered as three separate partial equilibria systems: the product homologous series; the water gas shift system, and the redox behaviour of the catalyst with the H 2 /O ratio of the gas. This approach correctly predicts the impacts of changes in a variety of parameters (temperature pressure, feed composition) on the ASF product distribution. In addition, the catalyst phase changes with gas composition and pressure, indicative of an equilibrium response. Equilibrium is of much greater importance to the Fischer-Tropsch system than previously thought, and the decision to use a complex kinetics-based model rather than a simpler equilibrium based model should be taken with care.La distribution de produits dans la synthèse Fischer-Tropsch est normalement décrite par le modèle ASF (Anderson-Schultz-Flory)établi par la cinétique. Des variations du modèle cinétique sont proposées pour expliquer lesécarts par rapportà la distribution de l'ASF. Le système FischerTropsch peutêtre aussi bien décrit par la méthode deséquilibres de pseudo-éléments (CH 2 , H 2 , O). Un modèle d'équilibreà un paramètre est etabli pour la distribution des alcènes, alcanes et alcools. Le système Fischer-Tropsch devraitêtre considéré comme 3 systèmes d'équilibres partiels séparés: la série homologue de produits, le système de conversion eau-gaz et le comportement redox du catalyseur avec le rapport H 2 :O du gaz. Cette approche prédit correctement l'impact des changements sur plusieurs paramètres (température, pression, composition de l'alimentation) sur la distribution de produits de l'ASF. En outre, la phase du catalyseur change avec la composition du gaz et la pression, indiquant une réactioǹ a l'équilibre. L'équilibre est d'une importance beaucoup plus grande pour le modèle Fischer-Tropsch que ce qu'on pensait, et la décision d'utiliser un modèle complexe basé sur la cinétique plutôt que basé sur deséquilibres plus simple devraitêtre soigneusement pesée.

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Section: Equilibrium Effect In Oligomerizationmentioning

confidence: 99%

Notes on the issues of equilibrium in the Fischer–Tropsch synthesis

Norval

2008

Can J Chem Eng

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“…3b), which is typically observed in FTS and HAS processes [18]. Only very short chain compounds methane, ethane, and methanol show a major deviation, which is attributed to secondary reactions and/or different reaction mechanisms for these products.…”

Section: Gc/ms Product Analysismentioning

confidence: 94%

Higher Alcohol Synthesis: Product Analysis Using the Concept of Effective Carbon Numbers

Frank

Xie

Trunschke

2013

Chemie Ingenieur Technik

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A catalytic setup for Fischer-Tropsch synthesis to alkanes and alcohols is described. Within this single-channel reactor unit the reaction conditions can be varied in the ranges of 25 -400°C, 1 -100 bar, and 300 -120 000 h -1 gas hourly space velocity (GHSV). The broad product spectrum is efficiently analyzed by GC/MS. The concept of effective carbon numbers, as typically applied in refining and high-molecular chemistry, is suitable for the product spectrum comprising mainly alkanes, alkenes, alcohols, aldehydes, and carboxylic acids. This article provides details about the setup and general measurement procedures.

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“…The main reason is the limitation of the F-T reaction itself as the product distribution follows the Anderson-SchulzFlory (ASF) polymerizing model [26,37]. A great technological challenge, for countries with a large share of coal in their primary energy mix, is to improve the catalyst performances and optimize the reaction routes so as to develop much better technologies to avoid this issue.…”

Section: Fig 3 Carbon Flow Of the Whole Igcc-lf-ccs Systemmentioning

confidence: 99%

Carbon chain analysis on a coal IGCC — CCS system with flexible multi-products

Zhang

Gundersen

Roussanaly

et al. 2013

Fuel Processing Technology

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A carbon chain analysis is applied to assess a complex energy conversion system with CO2 Capture and Storage (CCS). A coal integrated gasification combined cycle, with CCS, which co-produces electricity and liquid fuels (IGCC-LF-CCS) is taken as a case study. A process simulation method is used to estimate the technological data, and balance the heat and electricity for the whole system. Carbon and energy flows are calculated to evaluate the mass conversion efficiency and the energy efficiency. The results show that in the case in which one third of the coal is allotted to synthesize liquid fuels, globally 60 % carbon is captured for storage, 19 % carbon is transferred to liquid fuels, 19 % carbon is emitted to the atmosphere as CO2, while the remaining carbon is discharged as solid waste. For the energy flow, 28.1 % of total higher heating value of coal is converted into the liquid fuels. The net electricity efficiency is 20.7 % accounting for the power demands by air separation, CO2 capture and compression. Three scenarios with different ratio of resource to produce electricity and liquid fuels with or without CCS have been studied and compared. This work will provide useful information for the coal resource utilization with CCS in a carbon-constrained world.

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The Fischer‐Tropsch Synthesis: Molecular Weight Distribution of Primary Products and Reaction Mechanism

Cited by 373 publications

References 6 publications

Notes on the issues of equilibrium in the Fischer–Tropsch synthesis

Notes on the issues of equilibrium in the Fischer–Tropsch synthesis

Higher Alcohol Synthesis: Product Analysis Using the Concept of Effective Carbon Numbers

Carbon chain analysis on a coal IGCC — CCS system with flexible multi-products

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